Drying apparatus



March 16 1926- E c READER DRYING APPARATUS Filed Feb. 12. 1925 a MH/AA// H Patented Mar. 16, 1926,

UNITED stares EDWARD C. READER, F CLEVELAND, OHIO.

DRYING APPARATUS.

Application filed February 12, 1925. Serial No. 8,702.

T0 aZZ whom it may/concern:

Be it known that I, EDWARD C. READER, a citizen of the United States, residing at Cleveland, in the'county oi Guyahoga and State 01 Ohio, have invented a certain new and useful Improvement in Drying Apparatus, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to drying apparatus, and more particularly to apparatus for drying material in a finely divided condition, such as sand. The general object of the invention is: to provide an apparatus of this character which will enable the material to be dried quickly and efl iciently and without danger of adhering to the walls of the drying conduit through which it is conducted to the place of storage. For convenience of description, the material to be dried will be referred to hereinafter as sand.

Further and more limited objects of the invention will appearhere-inafter and will be realized in and through'the construction and arrangement of parts shown in the drawings, wherein Fig. 1 represents a sectional side elevation of a drying apparatus embodying my invention; Fig. 2 is a detail in end elevation and Fig. 3 a detail in central sectional elevation of the drying-end of the nozz e through which heated air is discharged into the drying conduit. 7

Describing the various parts by reference characters, 1 denotes a heating chamber,

which may be of any approved construction, the chamber herein being provided with an openin 2 through which a combustible mixin re is supplied from a burner 3. The burner in the installation shown here-in is a burner ot' the injector burner type having a supply pipe i for oil and a pipe 5 for delivering. air under pressure thereto. The burner in its details forms no part of my invention, it being suflicient for my purpose to utilize any one of the existing numerous types of injector burners employing oil or gas and air under pressure.

6 denotes a blower, supported on a suitable standandhaving the deliyery pipe {3 exshaped openingv 10 the wall of the said chamber. From this opening,E a conduit 11 extends to a storage tank 12 for the dried sand, the said tank being shown as provided with. a gate-controlled outlet 13v which is adapted to discharge the sand, asdesired upon a conveyor 14. Y

The conduit 11 is provided with a hopper 12, which hopper is adapted to deliver into the conduit through a spout; 13. The hopper is provided with a rotary sand agitating device 1 1, which is adapted to break upthe caked, moist sand, the said device being pro vided with a pulley 15 by means of which it may be driven, if desired.

16 denotes a conveyor, the upper end of which extends around a sprocket 17 and which is provided with buckets, some of which are shown at 18 and which are adapted to deliver the wet or moist sand into the, hopper.

The delivery end of the air conduit 8 and the nozzle are completed by an additional tapered or trusto-eonical sleeve 19, which is fitted over the end of the nozzle part 9, the sleeve being provided with spiral blades 20 cast with, or otherwise secured at their outer ends to the inner wall of the sleeve, the inner ends of the blades projecting from a central forwardly-flaring conical hub 21 having its apex extending inwardly or rearwardly.

l Vith the parts constructed and arranged as described, the chamber 1 will be heated by the burner 3, the air for the burner being preferably taken from the conduit 8 by the pipe connection 5, said connection being prov'idedwith a valve 5 The blower being driven from any suitable source of power,

the air will operateto atomize the oil or other liquid fuel and deliver the mixture into the chamber 1, inthe manner usual with injector burners, and the mixture "will beburned in said chamber, the products being delivered. into the conduit 11. Air heated by the producto com usti n in the cham er e forced through the conduit 8 and, by reason of the construction of the nozzle 9, 19-21 will be thrown outwardly, with a whirling motion into the conduit ll. The sand to be dried will be delivered into this stream of air and products of combustion entrained by the action of the nozzle, will be thoroughly dried by the hot air and the products of combustion, and will be delivered by the blast into the tank 12.

It will be noted that the conduit 11 is of considerably greater cross-sectional area than is the conduit 8. This provides a relatively large area for the expansion of the blast of air and combustion gases and for the whirling ot the sand thereby, and enables the particles of wet sand to be separated and thoroughly dried, without adhcronce to the wall oi the conduit 11.

The conduit 8 is provided with gate 8 by means of which the therethrough may be re as desired.

The apparatus shown herein has proven efiicient in action, not only in preventing the caking oi the sand and its adherence to the wall 01 the conduit 11, but also in ell'ectin'g the complete and rapid drying of the sand.

Having thus described my invention, what I claim is 1. An apparatus of the character described comprising in combination a heating chamber, conduit extending from said chamber, means for delivering material to be dried into said conduit, a conduit in the said chamber and having its delivery end aligned with the adjacent end of the first; mentioned conduit, means for forcing a'drying fluid through the second conduit, and means for imparting a whirling motion to the fiuid delivered from the second conduit a sliding air b ast gulated or shut off,

- into the first conduit and for throwing such the second conduit llllO the first conduit and for thrmving such fluid outwardly against the inner wall of such second conduit.

5- An apparatus of the character dcscribed comprising in combination a heating chamber, a conduit extending from said chamber and communicating therewith, means for delivering material to be dried in o idccadui a onduit. in he said her and having a trusto-conical delivery end arranged within and spaced from the trusteconical inletof the first conduit, means for torcin a drying fluid through the second conduit, and means for imparting a whirling motion to the fluid delivered therefron'i into the first conduit and for throwing such fluid outwardly against the inner wall of such second conduit.

4:. An apparatus of the character described comprising in combination a heating chamber, a conduit extending from said chamber and communicating therewith, means for delivering material to be dried into said conduit, a conduit in the said chamber and having a delivery end arranged within. the inlet of the first conduit, the said delivery end of the second conduit being provided with a central conical hub and with spiral blades located between said huh and the inner wall of such delivery end whereby a heated drying fluid passing through the second conduit is given an out ward whirling motion causing it to press against the inner wall of the second conduit.

5. In apparatus of the character described con'iprising in combination a heating chamher, a conduit extending from one side of said chamber and communicating therewith, means for delivering material to be dried into said conduit, a conduit in the said chamber and having a delivery end arranged within the inlet of the first conduit, the said delivery end of the second conduit being provided with a central hub and with spiral blades extending from said hub toward the inner wall of such delivery end whereby a heated drying fluid passing through the second conduit is given an outward whirling motion causing it to press against the inner wall of the second conduit.

6. In an apparatus ot the character described, the combination of a heating chamber, a conduit communicating therewith and extending therefrom, means for delivering into said conduit particles to be dried, a conduit in the said chamber and having its delivery end aligned with the receiving end ol' the first mentioned conduit, the cross scctional area of the first conduit being niaterially greater than that of the second conduit, and means for supplying a drying fluid through the second conduit and for delivering the same in an outwardlywhirling direction into the first conduit.

7. In an apparatus of the character de scribed, the combination of a heating chain her, a conduit communicating with and evtendii'ig therefrom, means for feeding particles to be dried into said conduit. a conduit in the said chamber and adapted to deliver into the first conduit, means for sunplying air under pressure through the second conduit, a fluid-pressure burner for ea i g he a d cham er; a d connection between theeaid burner and the second conduit for supplying air under pressure to operate Such burner.

S. An apparatus of the character de scribed con'iprising in combination aheating chamber, a conduit extending from said 1 chamber and coinn'iunicating therewith, means tor delivering mater al to be drled into said conduit, a conduit in the said chamher and having a frusto-conioal delivery end arranged within and spaced "from the inlet of the first c0nduit5and means for forcing a drying fluid through the second conduit.

In testimony whereof, I hereunto afiix my signature. I

EDW'ARD C. READER. 

